Pupina godwinausteni Jirapatrasilp, 2022

Jirapatrasilp, Parin, Sutcharit, Chirasak & Panha, Somsak, 2022, Annotated checklist of the operculated land snails from Thailand (Mollusca, Gastropoda, Caenogastropoda): the family Pupinidae, with descriptions of several new species and subspecies, and notes on classification of Pupina Vignard, 1829 and Pupinella Gray, 1850 from mainland Southeast Asia, ZooKeys 1119, pp. 1-115 : 1

Pupina godwinausteni Jirapatrasilp sp. nov.

Figs 10C , 28Q, R , 32E, F , 33B, C

Type material.

Holotype CUMZ 12090/1 (Figs 10C , 28Q , 33B ), 5 June 2017, coll. C. Sutcharit, R. Srisonchai, A. Pholyotha. Measurement: shell height 8.8 mm, shell width 6.8 mm and 5 whorls. Paratypes CUMZ 12090/2-26 (24 shells and 1 specimen in ethanol; Figs 28R , 32E , 33C ) and NHMUK 20210335 (3 shells), same data as holotype; CUMZ 12091 (20 shells and 24 specimens in ethanol; Fig. 32F ) from the type locality, 5 Dec. 2020, coll. P. Jirapatrasilp, C. Sutcharit, A. Pholyotha.

Type locality.

Khao Wong Cave, Ban Rai District, Uthai Thani Province, Thailand, 15°01'52.6"N, 99°27'23.3"E, 246 m amsl.

Other material examined.

CUMZ 12092 (2 shells) from Tham Namthip Bureau of Monks , Lan Sak District, Uthai Thani Province, 28 July 2016 . CUMZ 12093 (1 specimen in ethanol) from Hup Pa Tat , Lan Sak District, Uthai Thani Province, 1 Oct. 2018 .

Diagnosis.

Shell globose; last whorl ca. 80% of shell height. Apertural lip very thickened and slightly expanded; with a furrow between inner and outer peristomes; inner peristome thickened, cord-like; apertural lip angled when observed from lateral view. Columellar tooth curved downward like an earlobe.

Differential diagnosis.

The globose shell shape of P. godwinausteni sp. nov. is most similar to P. siamensis , but P. godwinausteni sp. nov. differs from P. siamensis in having a larger shell, a more prominent parietal callus, a thicker apertural lip with a furrow between inner and outer peristomes, with an inner peristome thickened and cord-like, a longer posterior canal, a wider and more curved columellar tooth, and a more angled apertural lip when observed from lateral view.

Description.

Shell height 7.7-9.5 mm; shell width 5.5-7.0 mm. Shell globose, solid, semi-transparent, brown, devoid of prominent sculpture on glazed smooth surface. Apex obtuse. Growth lines on shell surface inconspicuous. Whorls 5, last whorl large (ca. 80% of shell height) and bulging. Spire angle ca. 90°, somewhat extended. Sutures slightly impressed, but shallow. Aperture circular; lip highly thickened (ca. 0.4-0.5 mm wide and 0.5-0.6 mm thick) with darker colour, slightly expanded; apertural lip when observed from lateral view angled. Apertural lip with a furrow between inner and outer peristomes, with inner peristome thickened and cord-like. Parietal callus thickened with darker colour. Peristome interrupted by two canals; posterior canal ca. 1.0-1.2 mm long, 0.6 mm at its widest, curved outward and bulging at the outer margin; anterior canal slit-like, as long as apertural lip width. Parietal tooth thick; columellar tooth curved downward like an earlobe (ca. 2.2 mm long, 1.2 mm wide and 0.5 mm thick), covering anterior canal. Umbilicus closed. Operculum round, yellowish, and transparent corneous with uneven edge.

Etymology.

The specific epithet is dedicated to H.H. Godwin-Austen, a British malacologist, who prominently contributed to malacological studies in South and Southeast Asia.

Distribution.

This new species is found in Uthai Thani Province, Thailand.

Figures

Figure 10. Umbilical, columellar and parietal views of A Pupinella mansuyi, specimen CUMZ 12148 from Pha Chu, Nan B Pupina artata from the Pupina artata species group, specimen CUMZ 12003 from Ban Ping Khong, Chiang Mai C Pupina godwinausteni sp. nov. from the Pupina arula species group, holotype CUMZ 12090 / 1 D Pupina aureola from the Pupina aureola species group, specimen CUMZ 12130 from Sra Morakot, Krabi.

Figure 28. Shells of Pupina arula species group from mainland Southeast Asia A-G Pupina peguensis A syntype of Pupina blanfordi NHMUK 1888.12.4.100 and specimens B CUMZ 12105 C CUMZ 12050 D CUMZ 12103 E NHMUK ex. Cuming coll. F CUMZ 12094, and G CUMZ 12108 H-J Pupina crosseana H lectotype MNHN-IM- 2000 - 35834 I paralectotype RBINS MT 966 / 10591, and J specimen CUMZ 12049 K, L Pupina siamensis K lectotype SMF 109948 and L specimen CUMZ 12052 M-P Pupina bilabiata sp. nov. M holotype CUMZ 12073 / 1 and specimens N CUMZ 12079 O CUMZ 12081, and P CUMZ 12086 Q, R Pupina godwinausteni sp. nov. Q holotype CUMZ 12090 / 1 and R paratype CUMZ 12090 / 2. Photo: P. Maestrati, MNHN (H), F. Trus, RBINS (I).

Figure 32. Live specimens of A Pupina siamensis, specimen CUMZ 12071 from Tham Khao Loi Temple, Rayong B-D Pupina bilabiata sp. nov. B paratype CUMZ 12073 / 2 from Banpot Pisai Temple, Chumphon and specimens C CUMZ 12082 from Pha Jor Cave, Nong Bua Lam Phu and D CUMZ 12087 from Ban Yai, Surat Thani E, F Pupina godwinausteni sp. nov.: paratypes E CUMZ 12090 / 26 and F CUMZ 12091 from Khao Wong Cave, Uthai Thani G, H Pupina aureola: specimens G CUMZ 12117 from Lod Cave, Nakhon Sri Thammarat and H CUMZ 12121 from Tham Thong Panara Temple, Nakhon Sri Thammarat, showing its microhabitat in rotten log. All not to scale.

Figure 33. A Pupina bilabiata sp. nov., specimen CUMZ 12086 from Na San Temple, Surat Thani B, C Pupina godwinausteni sp. nov. B holotype CUMZ 12090 / 1 and C paratype CUMZ 12090 / 2 from Khao Wong Cave, Uthai Thani D Pupina arula, syntype UMZC I. 103025 " Ind " E Pupina mouhoti, possible syntype NHMUK ex. Cuming coll. from Camboja F Pupina vescoi, syntype NHMUK 1893.2.4.767 from Cochin China. Photo: J. Ablett, H. Taylor, NHM (D).